Water pipe



FIG. 1 is a top-front right side perspective view of a water pipe;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines in the drawings depict portions of the water pipe that form no part of the claimed design. 

CLAIM The ornamental design for a water pipe, as shown and described. 